Have you ever wondered if mankind would ever travel to other planets? Maybe we can if we can survive their extreme climates. Why don’t we travel to something that we can survive on like the moons of our solar system? Currently there are 95 moons in our solar system and still counting. Actually NASA actually plan on visiting some of the moons and sending probes to ones we can’t survive on but maybe can have life on it. There is Triton, the coldest moon of our solar system and largest moon of Neptune. Io, the hottest moon of our solar system, orbits Jupiter. Phobos is actually a very small moon that orbits Mars and has a very low gravity making it cheaper to visit. There is also the moon Titan which is Saturn’s moon and the largest one, and another moon Europa which orbits Jupiter and has the first ocean that is not on Earth.

Triton, the coldest moon of our solar system, is the biggest moon of Neptune. It actually has some very interesting features; there are ice volcanoes of liquid nitrogen, geysers of boiling nitrogen that are the highest in the solar system and it has an ice sculptured landscape. The lava from the ice volcanoes are just melted ice that creates the moon’s landscape. It also has one twelfths of Earth’s gravitational pull. It is located three billion miles for the sun and its temperature go as low as 400 degrees below zero. Traveling five hundred million miles from the sun, orbiting Jupiter, is the moon Io. Io is the hottest moon in our solar system and it is a melting world of lava, volcanoes, and air that you can’t breathe. Loki is the largest volcano in the solar system and located on Io. Amurabi is a lava flow of 300 miles. Io is truly hell. The lava on Io flows like oil and us 500 degrees hotter than Earth’s lava. You can’t even outrun the lava of Io; there are mountains twice as large as Mount Everest. The radiation from Jupiter is extreme, four thousand times the lethal dose. Io even has auroras....

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...﻿ The fifth planet in oursolarsystem is the biggest planet called Jupiter. Jupiter is by far the largest planet in oursolarsystem. The mass of Jupiter is 300 times larger than Earth and is twice as big of all of the other planets in oursolarsystem combined. Jupiter is so large that some people think that it should be considered a star instead of a planet. Jupiter’s orbital period is almost 12 years long and rotates on its axis once every 9 hours and 50 minutes. Jupiter has a giant red spot on it that people refer it to Great Red Spot. The red spot is an ongoing, massive, hurricane-like storm that is about twice the diameter of Earth. The giant hurricane–like storm has been raging for at least several hundred years. Even sometimes there are smaller storms and they are swallowed up by the larger storms. Storms are very common on the planet usually white though, but only a few storms stay for a long period of time like Great Red Spot. Since Jupiter’s mass is so large it causes the temperature and pressure in Jupiter’s interior to be much greater than they are inside of Earth. The intense pressure and temperature get to be as high as 30,000 degrees Celsius. This has caused for the inside of the planet to be a liquid sea of metallic hydrogen, but scientists think that the inside of Jupiter is a solid, rocky, iron core.
The sixth...

...creating many new theories about different aspects of the universe. Some of these discoveries and theories include planetary accretion, the differences between inner and outer planets, the formation of planetary rings, how the asteroid belt got there, the formation of Earth’s moon, and the unusual rotation of the planet Uranus. Proper understanding of each of these discoveries and theories is important when learning aboutour universe.
Planetary Accretion
Planetary accretion has two main theories on how the planets in oursolarsystem were formed. The first of the two is the Solar Nebular Disk Model; this is where ourSolar System’s planets started out as small pieces and started to collide together, uniting into bigger pieces and this kept happening until they became planetesimals. Once they were planetesimals, they crashed together even more until they formed planets. This was said to have been done in a very hot environment; however, many people did not believe that the planets could align like they have and rotate in the same sense after being such a colossal environment. Anne Hofmeister, PhD, and Robert Criss, PhD, at Washington University in St.Louis created a new model called 3-D Accretion. Instead of an extremely hot temperature, the environment is cold. This thermodynamic and mechanical model gives an explanation for...

...The SolarSystem
By
"Delete this text and type your name here."
May 16, 2002
Introduction
As far as we know, there are nine planets locked in orbit around the Sun. Only one, our own Earth, supports life. But there are countless other suns throughout countless galaxies scattered across the expanse of the universe. We still don't know if life exists on another planet in some other galaxy.
Mercury
Named for the wing-footed messenger of the Roman gods, Mercury races around its orbit at a dizzying speed of 30 miles (48 kilometers) per second, making the Mercurial year only 88 Earth days long. In contrast, one rotation around its axisor a single daytakes almost 59 Earth days.
Geology
Mariner 10 gave us a wealth of information about Mercury when it approached the planet in 1974 and 1975. Because Mercury has no water and barely any atmosphere, no erosion has taken place on its surface. We see Mercury much the way it was soon after it formed.
Core
We learned that Mercury has an extremely weak magnetic field, which could indicate a hot metallic core, such as molten iron. Geologists think Mercury may be the most iron-rich planet in the solarsystem.
Crust
Mercury's crust seems to be silicate, like that of Earth.
Craters
The planet's surface, viewed for the first time via Mariner's cameras, is covered by craters. The battering occurred during the early period of the...

...SOLARSYSTEM
The solarsystem is a collection of heavenly bodies comprising a star, with planets and other objects orbiting around it. Oursolarsystem consists of the Sun which is orbited by 8 planets (including our very own Earth), and many other objects like moons (which orbit planets), asteroids and meteors. Several heavenly bodies like the Sun,Moon, Mercury, Venus, Mars, Jupiter and Saturn are visible to the naked eye, while the rest of the planets are visible through telescopes. There are also various bright asteroids, comets and meteors which are visible.
The Sun is the most important member of the solarsystem because it provides most of the light, heat and other energy vital for existence of life. The eight known planets orbit around the Sun in slightly oval orbits, of which the first four planets: Mercury, Venus, Earth and Mars are rocky planets, whereas the next four: Jupiter, Saturn, Uranus and Neptune are gaseous planets. Pluto was the ninth planet earlier and as it is very small in size, scientists from around the world collectively demoted it. Hence, now it is no longer considered to be a planet.
Formation of the SolarSystem
By analyzing the radioactive decay of radioactive elements in the meteorites, astronomers have said that the origin of the...

...The SolarSystem
The solarsystem still to this day one of the most fascinating subjects of study in the science world. In our time, we are one of the first generations to see the planets of oursolarsystem up close, and we have been able to view evolution of these planets through
time. Oursolarsystem consists of a middle aged star called the Sun, 9 planets, about 100 moons, thousands of asteroids, millions of icy bodies, and many comets revolving around all of it.
We can begin by looking at the origin of the solarsystem. The protoplanet nebular model is the theory that is most widely accepted to describe the origin of the solarsystem. The model is made up of 3 stages: A, B, and C. Stage A is the beginning of the creation of the elements that are heavier than hydrogen in previously existing stars. Part 2, stage B, is when the nebula is formed from the raw materials that were created in the first stage, A. With gravitational attraction, the nebula contracts forming the protosun in the center of the nebula. The protosun is then surrounded by a fat, bulging accretion disk around it. The sun forms from the protosun, and the planets form in the accretion disk. Stage C, Part 3, begins as the protosun becomes established...

...﻿
1. Oursolarsystem is made up of the sun and everything that travels around it. This includes eight planets and their natural satellites such as Earth's moon; dwarf planets such as Pluto and Ceres; asteroids; comets and meteoroids
2. The sun is the center of oursolarsystem. It contains almost all of the mass in oursolarsystem and exerts a tremendous gravitational pull on planets and other bodies.
3. Oursolarsystem formed about 4.6 billion years ago.
4. The four planets closest to the Sun - Mercury, Venus, Earth, and Mars - are called the terrestrial planets because they have solid, rocky surfaces.
5. Two of the outer planets beyond the orbit of Mars - Jupiter and Saturn - are known as gas giants; the more distant Uranus and Neptune are called ice giants.
6. Most of the known dwarf planets exist in an icy zone beyond Neptune called the Kuiper Belt, which is also the point of origin for many comets.
7. Many objects in oursolarsystem have atmospheres, including planets, some dwarf planets and even a couple moons.
8. Oursolarsystem is located in the Orion Arm of the Milky Way Galaxy. There are most likely billions of other solar...

...SolarSystemAbout 4,700 million years ago, the SolarSystem was just a spinning disc of dust and gas. The dust began to collect together and our Sun formed at the centre.
Around Sun, lumps of rock joined up to form smaller bodies and, like the Sun, they heated up. But because they were smaller they soon cooled down and became planets. Sun accounts for 99.85 per cent of mass of the solarsystem. About 1.3 billion earths would fit inside the sun.
The solarsystem consists of the Sun; the nine planets, 67 satellites of the planets and a large number of small bodies (comets and asteroids). The inner solarsystem contains the Sun, Mercury, Venus, Earth and Mars. The planets of the outer solarsystem are Jupiter, Saturn, Uranus and Neptune.
Mercury –
Mercury is named after the messenger of the Roman gods. It is the smallest of the inner planets and the second smallest in the whole SolarSystem. It has a very weak magnetic field and – being the closest planet to the Sun – has only a very thin atmosphere of helium captured from the solar wind.
Venus –
Venus is named after the Roman goddess of love. It is the second planet from the Sun and the brightest object in the sky other than the Sun and the Moort. Venus has the most...

...SOLARSYSTEM
PLANETS
MERCURY
• The closest planet to the sun, Mercury is
only a bit larger than Earth's moon. Its day
side is scorched by the sun and can reach
840 degrees Fahrenheit (450 Celsius), but
on the night side, temperatures drop to
hundreds of degrees below freezing.
VENUS
• The second planet from the sun, Venus is terribly
hot, even hotter than Mercury. The atmosphere is
toxic. The pressure at the surface would crush and
kill you. Scientists describe Venus’ situation as a
runaway greenhouse effect. Its size and structure
are similar to Earth, Venus' thick, toxic
atmosphere traps heat in a runaway "greenhouse
effect.
EARTH
• The third planet from the sun, Earth is a water
world, with two-thirds of the planet covered by
ocean. It’s the only world known to harbor life.
Earth’s atmosphere is rich in life-sustaining
nitrogen and oxygen. Earth's surface rotates
about its axis at 1,532 feet per second (467
meters per second) — slightly more than 1,000
mph (1,600 kph) — at the equator.
MARS
• The fourth planet from the sun, is a cold,
dusty place. The dust, an iron oxide, gives
the planet its reddish cast. Mars shares
similarities with Earth: It is rocky, has
mountains and valleys, and storm systems
ranging from localized tornado-like dust
devils to planet-engulfing dust storms. It
snows on Mars.
JUPITER
• The fifth planet from the sun, Jupiter is
huge and is the most massive planet in...